Adjustable cowl for smoke-stacks.



P. J. ANDREWS. ADJUSTABLE GQWL FOR SMOKE STAGKS.

APPLICATION FILED APR. 11, 1911.

Patented Jan. 2, 1912.

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STTS ATENT OFFICE.

FRANK JAY ANDREWS, OF HOLDEN, ALBERTA, CANADA. 7

ADJUSTABLE COWL FOR SMOKE-STACKS.

To all whom it may concern.

Be it known that I, FRANK JAY ANDREWS, a subject of the King of Great Britain, residing at the town of Holden, in the Province of Alberta, Canada, have invented certain new and useful Improvements in Adjustable Cowls for Smoke-Stacks, of which the following is a specification.

My invention relates to improvements in adjustable cowls for smoke stacks, and is more particularly designed to be used in connection with smoke stacks for traction engines, and the principal object of my invention is to combine with a smoke stack, an adjustable cowl which will act as a wind brake,- and so prevent the current of air from striking the products of combustion as they escape from the stack. As the said cowl is substantially semi-circular, when properly positioned it will shield the top of the smoke stack, and so effectually prevent the creation of wind pressure in and at this point, and so insure the ready and free escape of the products of combustion from the stack and their quick removal, thus materially increasing the draft through and from the fire box, with resultant self-evident advantages.

Another object of my invention is to provicle a particular construction of means for supporting and manipulating the cowl.

A still further object of my invention is to construct the attaching means for my cowl so that a spark arrester may be readily placed in position and removed from the stack, and the construction of my preferred form of invention, will be hereinafter particularly set forth, and the parts I claim as new will be pointed out in the claims forming part of this specification.

Figure 1 is a side elevation of a smoke stack, and portion of the boiler therefor, showing my cowl and operating means attached to the stack, and also showing the means whereby the operator shifts the position of the cowl. Fig. 2 is a plan view of the stack and the parts carried thereby illustrated in Fig. 1, and Fig. 3 is a vertical cross section on the line ab, Fig. 1, on an enlarged scale.

In the drawings, like characters of reference lndicate corresponding parts in each figure.

The cowl I use will extend above the top Specification of Letters Patent.

Patented Jan. 2, 1912.

AppIication filed April 11, 1911. Serial No. 620,467.

of the smoke stack, approximately for one- 'thlrdof the height of the stack, and as it is semi-circular in horizontal cross section it Wlll act as a wind brake for the whole upper surface of the smoke stack, thus preventing the wind from striking against any portion of the inner edge of the smoke stack, resulting in the advantages before set forth. As the cowl is readily adjustable, it can be moved as the wind shifts so as to occupy the most effective position. As will be hereinafter more particularly set forth, the said cowl is so constructed as to permit of its ready removal from the smoke stack should conditions demand this.

Although my invention is designed to be that on very windy days, particularly if the straw be damp, which is often the case, it

is very difiicult to maintain the necessary steam pressure unless I use a cowl. With the use of the cowl I found it not only easy to maintain the necessary steam pressure,

but I also found that I could get up steam much quicker than without it.

A is the smoke stack and B the boiler supporting the same. The ring plate C will of course be made to fit the smoke stack more or less snugly, and the same is integrally provided with a flange D.

E are a plurality of brackets which are bolted by the nuts and bolts F to the smoke stack A. The upper ends of these brackets are secured by the nuts and bolts G to the flange D. Of course any suitable means may be used by me to attach the ring plate C in place. The brackets E will preferably be constructed so that they may be bent as conditions demand in fitting the ring plate in place. Integrally formed with thering plate C is an annular step 2, and integrally formed also with said ring plate is an annular collar 3 which projects above the said step. The said ring-plate constructed as de scribed, is the base or foundation for supporting the cowl and its immediately-associating operating parts.

.4 is a toothed-ring plate which rests upon and is carried by the annular step 2, and the vertical portion of the ring-plate 4 is made in the form of an annular collar or ring 5 which projects above the annular collar 3. The annular collar or ring 5 is divided into an annular flange 6 which is spaced apart from the supporting-plate 7 preferably integrally formed with said annular collar or ring 5. By reason of preferably integrally forming the supporting-plate 7 with .the ring 5, I preferably form an annular flange 8 integrally with said ring 5 so that the same may project beyond the inner surface of the said ring 5, and so provide suffi cient material at the base of the supportingplate 7 for the purpose of giving this plate 'rm support from the annular collar or ring 5,

9 is the cowl, and same is substantially semi-circular in horizontal cross section.

This cowloccupies the position illustrated rests the flange 12 of the spark arrester.

The attaching means for the cowl 9, hereinafter particularly described, is also out of the path of movement of the spark arrester.

Passing through a hole formed in the annular collar or ring 5 is a bolt 12, intermediate the head 13 of which and the cowl 9 is a plate 14 used to increase the thickness of the metal of the cowl where the bolt 12" passes therethrough.

15 is a thumb-nut screwing onthe outer end of the bolt 12.

- By the means just described, the cowl can be firmly held in place and in case it should be necessary to remove the same, this can be readily done.

The supporting-plate 7 is preferably of the shape shown particularly in Fig. 1, as this shape while giving ample support to the cowl 9, does notunnecessarily increase theweight to be carried by the ring-plate C.

r 16 and 17 are standards secured by nuts and bolts,or other suitable fastening means, to the ring-plate C, and held in bearings in these standards is a worm-shaft 18. Mount- ,ed on this worm-shaft and between said standards is a worm-19 which engages with the teeth 20 of the toothed-ring-plate 4 and moves this ring-plate when turned. By reason of the annular step 2, I am enabled to position the worm 19- above the flange D of the ring-plate C so as to allow freedom of movement for this worm, and permit the parts to be easily and readily assembled.

A sprocket-wheel 21 is keyed to the wormshaft 18 and this wheel is connected by a sprocket-chain 22 to the sprocket'wheel 23 keyed to the shaft 24 provided with an operating crank 25. I

26 is a bearing carried by the boiler in which shaft 24 operates.

27 is a block-bearing in which the outer "end of the shaft 24 has bearing. This block hanging the inner side of the annular- V flange 6.

32 are a pair of brackets carried by the flange D, and these brackets are also each provided with an overhanging lip 33 which overlaps the annular flange 6 as shown in Fig. 3. The brackets 32 together with the standards 16 and 17 prevent the displacement of the toothed-ring-plate 4, as will be understood. The passage of the traction engine over a rough road will of course subject the before-mentioned parts to considerable jarring, and in order to prevent any displacement of the parts described, I have provided the means already set forth.

Of course the plate 1.4 may be integrally formed with the cowl 9, if desired.

I do not confine myself to the construction herein shown and described, except in so far as that may be rendered necessary by the prior state of the art and the terms of my claims.

What I claim as my invention is:

1. The combination with a smoke-stack, of an outside placed supporting member supported by the stack near the top thereof; meanssecuring said supporting member to the stack; a toothed ring-plate carried by said supporting member and surrounding the stack; a cowl substantially semi-circular in horizontal cross section detachably carried by said toothed ring-plate; means for detachably securing said cowl in place, and supporting the cowl outside of the internal horizontal diameter of said smoke stack a toothed member co-acting with saidtoothed ring-plate in order to move same to shift the position of said cowl; bearing members supported by said supporting member in which said toothed member has bearing; means for operating said toothedmember, and means carried by said supporting member andengaging said toothed ringplate in order to hold the same in proper relationship to said supporting member, as and for the purpose specified.

2. The combination with a smoke stack, of an outside-placed supporting member supported by the stack near the top thereof; means securing said supporting member to the stack; a toothed ring-plate carried by said supporting member surrounding the stack the said toothed ring-plate being integrally provided with an annular flange at its upper portion, and being further integrally provided with a supporting plate spaced apart from said annular flange; a cowl formed substantially semi-circular in horizontal cross section positioned against said supporting-plate, means carried by said toothed ring-plate for holding said cowl in position against said supporting plate and outside the internal horizontal diameter of said smoke stack, a toothed member co-acting with said toothed ring-plate in order to move same to shift the position of said cowl; bearing members supported by said supporting member in which said toothed member has bearing; said bearing member provided with lips overhanging the annular flange of said toothed ring-plate, and means carried by said support-ing member and constructed to overhang the annular flange of said toothed ring-plate, as and for the purpose specified.

3. The combination with a smoke-stack; a ring-plate integrally provided with a horizontal. flange and further integrally provided with an annular step and an annular collar projecting above and positioned within, said step, the said ring-plate designed to be placed around a smoke stack with its annular collar fitting thereagainst; means detachably secured to said horizontal flange for securing said ring-plate to said smoke stack; a toothed ring-plate resting upon said annular step and surrounding said annular collar and integrally provided at its upper portion with an annular flange; a cowl substantially semi-circular in horizontal cross section carried by said toothed ring-plate outside the horizontal diameter of said smoke stack; a supporting plate carried by said annular flange for supporting said cowl; detachable means carried by said annular flange for the purpose of securing said cowl in place; two standards carried by the flange of said ring-plate, and each provided at its upper end with a lip which overhangs the annular flange of said ring-plate; a wormshaft having bearing in said standards;

a worm mounted on said shaft and positioned between said standards and above said horizontal flange and in engagement with the teeth of said ring-plateg means for operating said worm-shaft, and means caring the annular flange of said ring-plate, as and for the purpose specified.

4. The combination of a toothed-ringplate integrally provided with a vertical annular flange, and further integrally provided with a vertically-disposed supporting plate spaced apart from said annular flange, a cowl substantially semi-circular in horizontal cross section positioned against said supporting plate, and detachable means carried by said annular flange for detachably securing said cowl in place.

In testimony whereof I have aflixed my signature in presence of two witnesses.

FRANK JAY ANDREWS.

Witnesses:

G. T. SOLAND, H. G. BRAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

' ried by said horizontal flange and overhang- 

